[DB-32172] pynuoadmin error reference from client package nuocmd command

After the change on pynuoadmin directory structure, the nuocmd script
needs to be updated with the new location of pynuoadmin folder,
specifically the script nuodb_cli.py

bin/nuocmd

@@ -22,7 +22,7 @@ fi
 
 # Find the pynuoadmin installation
 _pkgdir=etc/python/site-packages
-_cli="$_pkgdir/nuodb_cli.py"
+_cli="$_pkgdir/pynuoadmin/nuodb_cli.py"
 _home=
 test -n "$NUOCLIENT_HOME" && test -f "$NUOCLIENT_HOME/$_cli" \
     && _home="$NUOCLIENT_HOME"
@@ -31,4 +31,4 @@ test -z "$_home" && test -f "${DIR%/*}/$_cli" \
 test -n "$_home" || die "Cannot locate pynuoadmin installation"
 
 export PYTHONPATH="${PYTHONPATH:+$PYTHONPATH:}$_home/$_pkgdir"
-exec "$_python" -m nuodb_cli "$@"
+exec "$_python" -m pynuoadmin.nuodb_cli "$@"